#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>

int main()
{
    pid_t id=fork();

    if(id<0)
    {
      perror("fork");
      return 1;
    }
    else if(id>0) // parent
    {
        printf("parent[%d] is sleeping...\n",getpid());
        sleep(3);
        exit(0);
    }
    else 
    {
        printf("child[%d] is begin Z...\n",getpid());
        sleep(5);
        exit(EXIT_SUCCESS);
    }
    return 0;

}

